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model is worc - bosch greenstar 25 si met with gas safe friend tonight. he said the copper pipe work done by plumber was excellent, test boiler and it was right on. but the fall was 2 cm and should be about 13 cm over the course of the 2.7 meter internal run also it is sited wrong - the...

me again it is a worceter - bosch and the booklet says 300 mil to internal and external corner...

Do you mean down to 250 mil, not 25 mil? The corner is an external one, and I just went and measured. From the corner to center of the pipe is 240 mil. I turned on electrics and boiler fired up so steam was coming out. It is a pretty obvious thing, nothing subtle about it... A friend...

Posted this recently but maybe to wrong area - trying again redoing my flat and plumber has installed a 45 degree angle to save one meter of run on 100 mil flue pipe. flue comes out into small courtyard which has an exterior wall run of only about 850. IF he had drilled hole in the right...

doing a complete rehab of my flat. plumber has installed a combi and 100 mil flue piping. we ran into some trouble with the length of the flue and rather than go to 125 mil pipe we stuck to 100 mil pipe and use a 45 degree bend rather than a 90. but he messed up the measurement and now...